--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.10)
 CMAKE_POLICY(SET CMP0003 NEW)
 
 PROJECT(quicly)
--- a/deps/picotls/CMakeLists.txt
+++ b/deps/picotls/CMakeLists.txt
@@ -1,4 +1,4 @@
-CMAKE_MINIMUM_REQUIRED(VERSION 2.8.12)
+CMAKE_MINIMUM_REQUIRED(VERSION 3.10)
 CMAKE_POLICY(SET CMP0003 NEW)
 
 PROJECT(picotls)